Is this true or false. If it is true were can I find the web site to verify the answer. I am having a difficult time interputating what the statement is trying imply. Please could you help me. Thank you.

American colonies were born out mass slaughter of native Indians and though a new nation was formed on principles of Liberty and Equal Rights, the 19th Century ushered in a new wave of American Imperialism that would dominate the world throughout the 20th Century.